Health insurance denial & claim adjustment codes

What health insurance denial code B7 means on your EOB

The provider was not enrolled or credentialed with your plan on that date of service. This is an administrative failure on the provider or plan side, and under a network arrangement it is usually not something you can be billed for.

What usually causes it

• The provider was not enrolled on that date.
• Credentialing lapsed or was pending.
• The wrong provider identifier was used.

The documents that decide it

• The provider's enrollment status on that date.
• The claim as submitted.
• Your network directory listing at the time.

What to do next

If you chose the provider from the plan's own directory, that matters — directory errors shift responsibility away from you in many states.

This page explains what a code means. It is information, not advice — it does not tell you whether your specific claim should have been paid, and it is not legal, medical, or insurance advice. Your plan documents and your denial notice govern your situation.